选词填空。每小题1分，共10分。
（1）I ___ taller than John. ( is, am , are)
（2）_____ you heavier than Tom? ( is, am, are )
（3）She _____ three years older than her litter sister.( is, am, are )
（4）How _______ is your brother? ( tall, taller, high )
（5）An elephant is ______, and it is _______than a panda.( big, biger, bigger )
（6）The monkey’s tail is _____ than the rabbit’s tail. (long, longer, short )
（7）I’m taller than ____.(him, his, he ) But he is stronger than ______.( me my, I )
（8）My arms are longer than ______.( you, your, yours )